Machine for extracting threads from woven fabrics.



J. W. ESHELMAN.

MACHINE FOR EXTRACTING THREADS FROM WOVEN FABRICS.

2 SHEETS-SHEET l- APPLICA HO N F|LED SEPT- 2,1914- l,261,373.. Patented Apr. 2, 1918.

v v u n nnnn I II II II II IIIII/A J. W. ESHELMAN. MACHINE FOR EXT RACTING THREADS FROM WOVEN FABRICS.

APPLICATION FILED SEPT- 2.1914. 1,261,378, Patented Apr. 2, 1918.

2 SHEETS-SHEET 2.

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JOHN W. ESHELMAN, 0F BROOKLYN, NEW YORK.

MACHINE FOB EXTRAGTING THREADS FROM WOVEN FABRICS.

Specification of Letters Patent.

Patented Apr. 2, 1918.

Application filed. iieptemberfl, 1914. Serial No. 859,813.

To all whom it may concern:

Be it known that'I, J OHN W. ESHELMAN, a citizen of the United States, and resident of the borough of Brooklyn, in the city and State of New York, have invented a new and useful Improvement in Machines for Extracting Threads from Woven Fabrics, of which the following is a specification.

The object of this invention is to provide certain improvements in the construction, form and arrangement of difterent parts of a machine for extracting threads from woven fabrics whereby the threads to be extracted may be accurately and surely deflected from the plane of the body of the fabric with the least possible disturbance to the body of the fabric and such deflected threads entirely and rapidly removed.

My invention more particularly includes means for holding the fabric firmly in position while being operated upon by the thread deflecting and. cutting mechanisms; a suitable guard for the deflecting blade; a deflecting blade having a plurality of branches; a cutter plate having its under face shaped to coact with a knife set parallel with the axis of its shaft; and aeutter plate having a plurality of holes correspond ing to the number of prongs of the thread deflecting blade. 1 a

A practical embodiment of my invention isrepresented in the accompanying drawings, in which only so much of a machine of the above character is illustrated as willgive a clear understanding of my improvements. 3 I

Figure 1 represents the machine in front elevation with certain of the parts'broken away, y

Fig. 2 is a View of the machine in end elevation partly in section, with the cover plate for the head removed,

Fig. 3 is a detail section showing the thread deflecting blade and the guard therefor,

Fig. 4 is a detail vertical section on an enlarged scale of the parts shown in section in Fig. 2, y y

Fig. 5 is a detail horizontal section taken in the plane of the line AA of Fig. 4, with the deflecting blade and guard removed, v v

Fig. 6 is adetail plan view taken in the plane of the line B-B of Fig. 4,

Fig. 7 is an inverted plan view of the cutter plate, v i

Fig. 8 is a detail transverse vertical section taken in the plane of the line C G of Fig. 4,

Fig. 9 is a detail transverse section taken in the plane of the line D-D of Fig. 5,

Fig. 10 is a plan view of the knife,

Fig. 11 is a detail section taken in the 1 plane of the line F1F of Fig. 1, Fig. 12 is a detail plan view of the cutter head, cutter and shaft,

Figs. 13 and 14 are detail front and edge views, respectively, of the lower end of the posed rotary shaft 5, needle bar 6, presser bar 7, its divided presser foot 8 and feed plate 9, are of well known or approved construction and need not be specifically described herein.

A .lowerhorizontally arranged cutter shaft 10 is mounted beneath the table 1 and is driven, in the present instance, at'twice the rotary speed of the shaft 5 through a belt and pulley connection 11, 12, 13. This cutter shaft 10 is provided with a head l-i having a seat 15 for the knife 16, which seat is disposed parallel to the axis of the rotary shaft 10. The knife 16 is secured to the head 14 by means of a suitable faselongated slot 18 in the knife. The head 14:

.is provided with a lip 19 forming a guide for one of the side edges of the knife. The knife 16 has a diagonal cutting edge 20 beveled on its inner face to present a sharp cutting edge.

The parallelism of the knife seat with the axis of the rotary shaft and the diagonal .cuttingedge of the knife combine to cause the cutting edge of the knife to travel in a circular path inclined with respect to the axis of thesaid rotary shaft.

The cutter plate is denoted by 21 and it is secured in the proper position on the table 1 with respect to the rotary cutter by suittening screw 17 which passes through an n able fastening screws This plate has a plurality of transversely elongated holes .23 therethrough in position to receive a plurality of prongs at the lower end :of the deflecting blade to be hereinafter described.

The under surface of the cutter plate 21 is cut away in the plane of the rotary cutter to conform to the angularity of the cutting edge of the knife with respect to the shaft 10 so that the cutting edge 20 :of the knife will first come into engagement with the cutter plate as the edge reaches the holes 23 and leaves its engagement with the cutter plate as the edge passes beyond the said holes.

A slight ridge 24 is formed in the under surface of the plate 21 adjacent to the holes 23 which ridge projects slightly into the path of the cutting edge 20 of "the knife 16 'so that the said cutting edgeis slightly deflected for a very short portion of its rotary movement thereby causing :the edge to be self-sharpening and maintaining the edge at .a high degree of cutting efficiency. The cutaway surfaces 25 and 26 to the front and rear of the ridge 2i are so arranged :that the cutting edge 20 of the knife .has a free movement up to the hole 23 and a free movement after it leaves the ridge 2%, this latter free movement serving also to insure the free removal of the deflected threads separated from the fabric by the knife.

The thread deflecting blade is denoted by '27 and its lower end is flattened transversely of the lineof feed of the machine and is provided with a plurality of prongs 28 each having a diagonal bottom straight edge for facilitating the entry of the prongs between the crosswise threads of the fabric. Each gprong 28 has a notch 29 near the upper end of the diagonal straight edge, which notch serves to engage the same longitudinal thread of the fabric for insuring the proper number of longitudinal threads being deflected by the blade.

The number of prongs 28 0f the deflecting bladecorrespond t0 the number of holes 23 in the cutter plate 2 1. This blade is attached to the vertically reciprocating needle bar 6 passing through transverse hole '30 in the divided presser foot 8 and also through the transverse holes '28 in ithe cutter :plate 21.

Means are provided for holding the fabric "taut as it passes between the cutter plate and divided presser foot, which means :is herein shown as comprising :lugs '31 on the cutter eplate21 opposite shallow recesses 32 in the sides of the divided presser foot "8. The sides ef :the divided :presser foot are beveled and the adjacent sides of the lugs 31 are undercut so that as the fabric is passed over the lugs 31 and under the divided 'presser foot, the portion of the fabric :passing between the divided presser foot and the accurate deflection of the required number of threads by the prongs of the deflector blade.

A suitable tubular finger guard 33 surrounds the deflector blade 27 which guard is secured to the needle bar 6 by a suitable fastening screw 3st. This guard extends downwardly to within a short distance of the divided presser foot 8 and is provided with a longitudinal slot for permitting access to the screw 86 which fastens the defleeting blade to the needle bar.

The movements of the cutter with respect to the deflecting blade are so timed that the prongs of the deflecting blade will force the required number of longitudinal threads downwardly through the holes 23 and the prongs are then withdrawn before the said deflected threadsare acted upon by the knife of the rotary cutter in its first revolution. The knife of the rotary cutter is again caused to engage said deflected :threads =during its second revolution for insuring the removal o=f any of the deflected thread-s wlrich'were inot clean'ly removed by :the hnife in the first irevdlution =:oif the cutter.

After this second revolution :of the cutter,

the deflecting blade again forces the threads beyond the next succeeding transverse thread or threads, downwardly through the :holes 23, it being understood that the :fabric is moved step by step irearwardly :by the :feeding mechanism in :the usual manner.

It is to be understood that the number of prongs on-thedeflectingblade maybe varied to suit different requirements and that ithe width of each prong may be varied so that any desired number of threads within reasonable limits may \be removed.

It is evident that slight changes may be resorted to without departing from the spirit and scope of my invention; hence I do not wish :toIlimit myself strictly to the structure herein set forth, but

What I 'claim is.:

El. Inaanachineiof the character described, a thread deflecting blade having a plurality of thread iengaging prongs of predetermined widths and separated from each other by predetermined distances for acting -upon predetermined separated threads or separated rgroups=ott threads.

2. In a machine of the character described a thread deflecting blade having :a {plurality of .ithread engaging prongs of predetermined widths and separated from each "other :by predetermined distances for acting upon predetermined separated threads or separated :groups of threads "each gprong having an inclined bottom edge for facilitating ithe entry of the prongs between are crosswise threads ofithe fabric.

3. In a machine Oftthe character described, a thread deflecting blade having a plurality of thread engaging prongs of predetermined widths and separated from each other by predetermined distances for acting upon predetermined threads or groups of threads, each prong having an inclined bottom edge for facilitating the entry of the prongs be tween the crosswise threads of the fabric, and a notch at the inner end of such edge for insuring the proper number of longitudinal threads being deflected by the blade.

4. In a machine of the character described, a cutter plate having a plurality of holes therethrough, a thread deflecting blade having a plurality of prongs corresponding to the number of holes in the cutter plate for forcing the threads to be removed through said holes and means for removing the deflected threads.

5. In a machine of the character described, a cutter plate, thread deflecting means for forcing the threads to be removed through said plate, a rotary shaft, a cutter head thereon and a knife seated on said head U the knife with respect to the rotary shaft, to

insure. a proper coaction between the knife and cutter plate for removing the deflected threads. 7 r

6. In a machine of the character described, a cutter plate, a needle bar, a reciprocating &

thread deflecting blade for forcing the threads to be removed through said plate, a screw for fastening the deflecting blade to the needle bar, means for removing the deflected threads and a tubular finger-guard surrounding said deflecting blade and having a longitudinal slot for permitting access to said screw.

7 In a machine of the character described, a presser foot, a cutter plate, thread deflecting means for'forcing the threads to be removed through said plate, means for removing the deflected thread and lugs on the cut ter plate coacting with said presser foot for exerting lateral strain on the fabric to hold it taut as it is operated upon by the thread deflecting means.

8. In a machine of the character described, a presser foot having shallow recesses in its side edges, a cutter plate, thread deflecting means for forcing the threads to be removed through said plate, means for removing the deflected threads and lugs on the cutterplate, coacting with said recesses in the presser foot for exerting lateral strain on the fabric to hold it taut as it is operated upon by the thread deflecting means.

In testimony, that I claim the foregoing as my invention, I have signed my name, in presence of two witnesses, this first day of September, 1914:.

JOHN W. ESHELMAN.

Witnesses:

F. GEORGE BARRY,

C. L. LUNDGREN.

Copies of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents,

Washington, D. C. 

